I would have to agree with tech guru. Burying ethernet cable, or any copper cable is not wise. You can buy preterminated fiber optic cabling relatively cheap, and a pair of media convertors. The media convertors are a tad on the pricey side, but it will keep lightning out of the system and your house.

The media convertors are a tad on the pricey side, but it will keep lightning out of the system and your house.

That depends on which plan he plans to get. 30/4 a 100 base-fx pair would be fine which can be had for a fairly low price (starting around $30 each). BUT if he gets the 100/5 plan he will need a gigabit connection which costs a lot more ($55+ each)